JPH0246157A - Linear pulse motor type driver for laterally moving object - Google Patents

Abstract

PURPOSE:To miniaturize the title apparatus and reduce its cost by providing said apparatus with a channel-shaped rail, which is laid after a scale and a pulse signal feeder have been arranged therein, and with a movable element built in said rail. CONSTITUTION:The subject apparatus uses a linear pulse motor for a curtain rail for a domestic room curtain and is equipped with a rail 1 laid on the ceiling side along the moving path of a curtain 2, when said curtain is opened and closed. A motor scale 3 with dentitions at a specified pitch formed in a magnetic plate is laid in the center of the ceiling face within said rail 1 along the lengthwise direction of the rail and input pulse signal feeders 4 are laid in the left and right side faces via insulator 5. On the other hand, the movable element 6 of said linear pulse motor is built in the inner part of the rail 1. Said movable element 6 is composed of a pair of electromagnets consisting of U-shaped cores 6b, in which pole teeth 6a face each other, and exciting coils 6c; a permanent magnet 6d, and a yoke 6e; and is equipped with a traveling roller 7 and collecting brush 8. Thus, an input pulse signal is given to said coils 6c so that the movable element 6 is caused to start stepping motion.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to indoor curtains for hotel guest rooms, or moving objects such as bookshelves, accordion doors, etc.
The present invention relates to a linear pulse motor drive device in which the traversing body is suspended and supported on a rail, and is directly driven by a linear pulse motor to open and close the body.

[Conventional technology]

Taking the above-mentioned indoor curtain as an example, electrically operated curtain rails have been known in which the curtains are opened and closed in response to commands such as a switch operation. This electric curtain rail incorporates a cable for operating the curtain into the curtain rail installed on the ceiling side, and lets out the cable from a reel by driving a motor, and -1! Operate to open the curtain.

It was designed to be closed. Furthermore, recently some electric curtain rails have been commercialized for extremely small curtains such as those inside automobiles, which open and close the curtains by directly driving the curtains using a linear DC motor built into the curtain rail. ing.

[Problem to be solved by the invention]

However, in the conventional electric curtain rail using cables, it is necessary to equip the curtain rail main body with an electric motor, a cable reel, a braking mechanism, etc., and the entire curtain rail becomes a large and zero-weight object. In addition, the cables are prone to breakage, entanglement, and other malfunctions during use, making maintenance and management troublesome.In addition, the curtain is mechanically conductively coupled to the drive motor via the cables, making it difficult to use. There are inconveniences such as the inability to freely open and close the curtains manually.

Further, in an electric curtain rail using a linear DC motor, it is necessary to install an expensive permanent magnet element such as a ferrite material along the entire length of the curtain rail, which increases the cost. Moreover, linear DC motors have problems in their function as curtain rails, such as the motor itself not having a braking function and the running speed changing depending on the load.

The present invention has been made in view of the above points, and aims to make the drive device smaller and more compact, free from maintenance, and improve operability.The present invention employs a linear pulse motor in the drive section to drive traverse moving objects such as curtains. To provide a linear pulse motor drive device which can be opened and closed by direct drive along a rail.

[Means to solve the problem]

In order to solve the above problems, the linear pulse motor type drive device of the present invention is a channel-type drive device in which a scale of a linear pulse motor and a power supply line for pulse signals are arranged in a rail and laid along the movement route of a traversing moving object. Rails, running rollers, and current collector brushes.

and a movable element of a linear pulse motor equipped with a hook for hanging the traversing body and incorporated into the channel-shaped rail.

In addition, in the above configuration, in order to reduce the noise generated as the linear pulse motor runs, a pair of front and rear electromagnets arranged on the rail with their magnetic pole teeth facing the scale,
For the movable body of a linear pulse motor, which is a combination of a permanent magnet and a yoke that span between electromagnets, the movable body is separated from the running rollers provided at the front and rear ends of the movable body at an intermediate position between the running rollers at the front and rear ends. It is preferable to additionally equip the roller with an auxiliary roller for maintaining the air gap.

[Effect]

In the above configuration, by applying an input pulse signal to the electromagnetic coil of the linear pulse motor mover from the outside via the power supply line laid on the rail side, the linear pulse motor mover supported by the running rollers is moved to the rail side. The robot moves in the specified direction along the scale of the pulse at a speed commensurate with the pulse frequency. As is well known, linear pulse motors have characteristics such as large starting thrust, constant speed characteristics that are not affected by load fluctuations, magnetic braking force, and free positioning controllability, and their structure is robust and prevents failure. There is little occurrence of this, and it can be used for a long time with almost no maintenance.

In addition, a traverse moving object such as a curtain is suspended and supported by a movable element of a linear pulse motor, and is opened and closed in a direct drive manner along a rail in a specified direction as the linear pulse motor moves step by step. be done. Note that in this case, the rail does not necessarily have to be straight; for example, a rail curved in an S-shape can also be used.

Further, when the movable element of the linear pulse motor is stopped, it is possible to freely move the traversing body along the rail by manual operation without being restrained. In other words, in addition to being driven by a linear pulse motor, curtains and the like can be opened and closed freely by manual operation.

On the other hand, to increase the magnetic propulsion force of a linear pulse motor,
It is desirable that the air gap length between the magnetic pole of the electromagnet on the mover side and the scale on the rail side be as narrow as possible, and is usually designed to be a minute gap of about 10 to 50 μm. For this reason, if the bending rigidity of the mover and scale is insufficient, a large magnetic attraction force acting between them causes deflection, and the scale and the magnetic pole teeth of the mover come into mechanical contact with each other. Moreover, the polarity of the input pulse signal applied to the mover from the outside changes periodically, which causes bending vibrations throughout the linear pulse motor, causing the mover to hit the scale on the rail side while running, causing a large amount of noise. There is a possibility that this may occur.

In this respect, for the movable element of a linear pulse motor, an auxiliary roller is additionally installed in the center of the movable element body, separate from the running rollers provided at the front and rear ends of the movable element body, so that the movable element can easily move against the rail. The system changes from two-point support in the front and back to three-point support in the front, back, and center, and the support span between the rollers is halved. As a result, assuming the same rigidity conditions as the scale of the linear pulse motor and the movable element itself, the deflection amplitude due to the magnetic attraction force between the scale and the movable element is reduced to approximately A compared to that without the auxiliary roller. Become. Therefore, even if the air gap length is set narrow as mentioned above, mechanical contact between the scale on the rail side and the magnetic pole surface on the movable element side due to the magnetic attraction force is suppressed, resulting in the movement of the linear pulse motor. Noise generation can be significantly reduced.

〔Example〕

1 and 2 show the structure of an embodiment of the present invention, which is applied to a curtain rail for indoor curtains. In the figures, 1 indicates the opening of the curtain 2.

This is a rail laid on the ceiling side along the closing movement path, and the rail 1 is a channel-shaped rail with a rectangular cross section with a slit la opened in the longitudinal direction at the center of the lower surface, and the rail 1 is laid along the longitudinal direction of the rail 1. In the center of the ceiling surface is a magnetic plate with a predetermined row of teeth.

A scale 3 of a linear pulse motor with a hole or a hole formed therein, and power supply lines 4 for input pulse signals are laid through an insulator 5 on the left and right sides.

On the other hand, a movable element 6 of a linear pulse motor is installed inside the rail 1. This movable element 6 consists of a U-shaped core 6b installed on the scale 3 with the magnetic pole teeth 6a facing each other across an air gap, and an excitation coil 6C wound around each leg of the core 6b. A pair of electromagnets lined up (in the drawing, only one set of electromagnets is shown, and the other set of electromagnets is omitted), a permanent magnet 6d coupled to the back of the core 6b, and a pair of electromagnets. A yoke 6e, which also serves as a connecting body, is provided on the back side of the permanent magnet 6d, spanning between the electromagnets, and constitutes a main body of the mover. Furthermore, at both front and rear ends of the movable body, there are running rollers 7 that roll in contact with the upper and lower rail surfaces of the channel rail 1 (in the drawing, only the running rollers provided at one end of the movable body are shown). ), and the left and right sides are equipped with current collector brushes 8 that slide on the power supply ta 4 described above, and the lower surface side is equipped with a hanging hook that protrudes to the lower surface of the rail through the slit 1a of the channel-shaped rail l. 9 is installation. In addition, as the current collector brush 8,
In addition to the usual carbon brush, it is also possible to use a brush that uses conductive magnetic fluid and has almost no frictional resistance.

On the other hand, the movable element 6 of the linear pulse motor described above is used as the leading wheel of the curtain 2, and the leading end of the curtain 2 is suspended and supported from a hanging hook 9 via a piece-shaped curtain hook 2a. Note that a subsequent guide roller, which suspends the middle portion of the curtain 2, is movably incorporated in the same rail 1.

With the above configuration, the power supply line 4. By applying an input pulse signal through the current collector brush 8, the magnetomotive force acts synergistically with the magnetic force of the permanent magnet 6d, and an electromagnetic propulsive force is generated between the mover 6 and the scale 3, and the current direction of the pulse signal is , the movable element 6 moves step by step along the scale 3 on the rail side via the running roller 7 in a direction and at a speed corresponding to the pulse frequency. Further, when the power supply of the input pulse signal is stopped, braking is performed by the magnetic attraction force between the permanent magnet 6d and the scale 3, and the movable element 6 is stopped at that position. Note that the operating principle of such a permanent magnet type linear pulse motor is well known, and detailed explanation thereof will be omitted here.

Therefore, by interlocking the above-mentioned linear pulse motor with the sidewalk, the curtain 2 suspended and supported by the movable element 6 is moved along the rail 1 in the direction of arrow A to open and close it. Regarding the traveling roller rough mentioned above,
In the running state of the linear pulse motor, the upper running roller comes into contact with the upper rail surface of the rail 1 due to the magnetic attraction force between the scale 3 and the movable element 6, causing the scale 3 and the movable element to
In the stopped state, the lower running roller hits the lower rail surface of the rail 1 and supports the load weight of the linear pulse motor. Further, the power supply line 4 is laid over the entire length of the rail 1, and no matter where the movable element 6 is located, the input pulse signal can be supplied without support via the current collector brush 8. Furthermore, when the movable element 6 is in a stopped state with no pulse signal input, by pulling the curtain 2 with one's hand, the curtain 2 can be opened and closed manually by overcoming the magnetic braking force of the permanent magnet 6d. be able to. Furthermore, the rail 1 does not necessarily have to be straight; for example, a rail curved in an S-shape can also be used.

The illustrated embodiment is a curtain for indoor curtains.

I mentioned rails, but other than curtains, such as borders, etc.
a? - It goes without saying that the present invention can also be applied as a drive device for various types of traversing moving objects such as daylight doors.

Next, FIG. 3 shows an applied example in which the above-mentioned example is further improved.
First, in FIG. 3, the basic structure of the movable element 6 is the same as that of the previous embodiment, but the movable element body is separated from the running rollers 7 provided at the front and rear ends of the movable element 6. An auxiliary roller 10 for maintaining an air gap is newly additionally installed on the side facing the scale 3 at the center of the rail 1, that is, at an intermediate position between a pair of electromagnets arranged in front and behind the rail 1. This auxiliary roller 10 is fixed with bolts or the like via a single-shaped roller support 11 between the cores 6b. The height of the installation is adjusted so that it contacts the rail surface.

With this configuration, compared to the previous embodiment in which the running rollers 7 were provided only at the front and rear ends of the movable element 6, the support of the movable element 6 by the rollers is changed from two-point support (the running rollers 7 at the front and rear ends) to the front, rear, and center supports. There is a three-point support (running roller 7 and auxiliary roller 10 at the front and rear ends), and the support span l between the rollers is reduced to A of the span L between the running roller roughs. therefore,
Rail side scale 3. Under the same bending rigidity condition of the movable element 6, the deflection due to the magnetic attraction force acting between the scale 3 and the movable element 6 is reduced to about A.

As a result, the magnetic pole teeth 6a in the scale 3 and mover 6
Even if the air gap length g between the
The degree of mechanical contact between the magnetic pole teeth 6a and the scale 3 is reduced, and the noise generated due to this mechanical contact is significantly reduced. This noise reduction effect has also been confirmed through actual machine tests.

Moreover, FIG. 4 shows an improvement plan for the mounting structure of the auxiliary roller 10, in which a guide groove 12 is provided in the roller support 11, and the axle of the auxiliary roller 10 is connected to the axle of the auxiliary roller 10 through a compression spring 13 in this groove. The attached rod 14 is inserted.

Here, the spring pressure of the compression spring 13 is adjusted appropriately (this eliminates the need for troublesome adjustment work to match the levels between the running roller 7 and the auxiliary roller 10 at the front and rear ends during assembly.

Furthermore, another roller mounting structure includes a running roller 7 installed at the front and rear ends of the movable element 6 and an auxiliary roller 1 installed at the center.
It is also possible to prepare a roller assembly in which the rollers 0 and 0 are level-adjusted and pivotally supported in a line on a common support frame in advance, and to fix this roller assembly to the left and right side surfaces of the movable element 6 and assemble it.

〔Effect of the invention〕

Since the linear pulse motor type drive device for a traversing moving body according to the present invention is configured as described above, it exhibits the following effects.

(1) Linear pulse motor scale inside the rail.

A channel-shaped rail is equipped with a power supply line for pulse signals and laid along the moving route of the traversing moving body, and a running roller, a current collector brush, and a hook for hanging the traversing moving body are installed inside the channel-shaped rail. A linear pulse motor type drive device is constructed with a linear pulse motor movable element built into the motor, making it smaller than conventional cable type electric drive devices.

With a compact configuration, the transverse moving object can be directly driven and moved smoothly. In addition, compared to drive devices that apply conventional linear DC motors, it is possible to create a relatively inexpensive device with excellent braking function, and when the linear pulse motor is stopped, manual lateral movement is not required without any restraints. A highly versatile linear pulse motor drive that can be used for curtains and other types of traversing moving objects, as it can be used to move the body, is robust, rarely breaks down, and can be used for a long time with almost no maintenance. equipment can be provided.

(2) In addition, in the linear pulse motor type drive device having the above configuration, a linear pulse motor drive device is constructed by combining a pair of front and rear electromagnets lined up on the rail with magnetic pole teeth facing the scale, a permanent magnet that straddles between the electromagnets, and a yoke. Separately from the running rollers provided at the front and rear ends of the movable body of the pulse motor, an auxiliary roller for maintaining an air gap is additionally installed at an intermediate position between the front and rear running rollers. By reducing the support span between the rollers, the deflection of the scale and mover due to magnetic attraction is suppressed, and this reduces the degree of mechanical contact between the mover and the scale when the linear pulse motor runs, thereby reducing noise generation. Significant reduction can be achieved.

[Brief explanation of the drawing]

Figures 1 and 2 are front and side views showing the configuration of an embodiment of the present invention applied to a curtain rail, and Figure 3 is a side view of an applied embodiment in which the mover of a linear pulse motor is equipped with an auxiliary roller. FIG. 4 is a configuration diagram of an improved embodiment with regard to the mounting structure of the auxiliary roller. In each figure, 1: Channel type rail, 28 curtains (transverse moving body)
, 3 Niscale, 4: Power supply line, 6: Mover, 6a: Magnetic pole tooth, 6b + electromagnet core, 6c: Excitation coil, 6d: Permanent magnet, 6e: Yoke, 7: Running roller, 8: Current collector brush, 9
: Hanging hook, 10: Auxiliary 6a // 10 Inscription power) La 6 ≧ Gu Figure 3, 4th area

Claims (1)

[Claims] 1) A linear pulse motor drive device for suspending and moving a traversing object such as a curtain, which comprises a scale for the linear pulse motor and a power supply line for pulse signals disposed within the rail. A channel-shaped rail laid along the movement route of the traversing moving body, a movable element of a linear pulse motor equipped with a traveling roller, a current collector brush, and a hook for hanging the traversing moving body and incorporated in the channel-shaped rail. A linear pulse motor drive device for a traverse moving body, characterized by comprising: 2) In the linear pulse motor drive device according to claim 1, a pair of front and rear electromagnets are arranged on the rail with magnetic pole teeth facing the scale, and a permanent magnet straddles between the electromagnets.
Separately from the running rollers provided at the front and rear ends of the movable body of the linear pulse motor that is combined with a yoke, an auxiliary roller for maintaining an air gap is provided at an intermediate position between the running rollers at the front and rear ends. A linear pulse motor type drive device for a traverse moving body characterized by additional equipment.